Transmission mechanism for power booms of concrete pavers



Nov 16; 1937. A. E. LUNDBYE 2,099,070

TRANSMISSION MECHANISM FOR POWER BOQMS OF CONCRETE PAVERS Filed Sept. 11, 1955 4 SheetsSheet 1 Gum/144a;-

Nov. 16, 1937. A. E. LUNDBYE TRANSMISSION MECHANISM FOR POWER BOOMS OF CONCRETE PAVERS Filed Sept. 11, 1935 4 Sheets-Sheet 2 Axel E. Lund'b ye,

A. E. LUNDBYE Nov. 16, 1937.

TRANSMISSION MECHANISM FOR POWER Booms OF CONCRETE PAVERS Filed Sept. 11, 1935 4 Sheets-Sheet 3 A eZEL ,undb ,e, j

TRANSMISS ION MECHANISM FOR POWER BOOMS OF CONCRETE PAVERS Filed Sept. 11, 1955 4 Sheets-Sheet O kw. 4,

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Patented Nov. 16, 1937 U TAT E S PATENT OFEE TRANSMISSION MECHANISM FOR POWER BOOMS OF CONCRETE PAVERS Axel E. Lundbye, Nunda, N. Y., assignor to The Foote Company, Inc., Nunda, N. Y., a corpora tion of Delaware Application September 11, 1935, Serial No. 40,178

1 Claim.

' of and also utilized to advance or retract diiferent forms-ofdistributing carriages on the boom.

In a co-pending application filed by me on May 25, 1935, bearing Serial Number 23,490, for Concrete pavers, a power boom is shown mounted on this transmission mechanism, there being in that instance a form of carriage wherein the conveyor belt changes its direction at a point intermediate its opposite ends, so that the concrete or aggregates may be distributed at any desired point along the boom.

In another co-pending application filed by me on September 11, 1935, bearing Serial Number 40,179, for Distributing means for concrete pavers, this transmission mechanism is also shown in combination with a boom and traveling carriage wherein the carriage is provided with abutment means to dam the concrete or aggregates and deflect the passage thereof at either or both sides of the boom into delivery chutes.

The present application relates to the transmission mechanism per se, a portion of the endless conveyor, a portion of the means for operating a carriage as well as a portion of the means for traversing the boom, which is also shown and described toillustrate the manner in which the transmission is used.

Still another object of the invention is to provide a transmission or power transmission mechanism that may be readily positioned on different styles of pavers wherein an endless conveyor belt is used rather than the old type of boom and bucket.

As is well known, a certain form of transmission mechanism is needed for paver booms, due to the necessity of continuously traversing the boom, to the fact that the boom has to be raised and lowered, and finally to the fact that power must at all times be applied to the conveyor belt, regardless of the angular position of the boom.

Still another object of the invention, therefore, is to provide a compact transmission mechanism wherein the power is derived from the power plant of the paver and may be distributed to the boom and its several operating mechanisms.

With these and other objects in view, the invention consists in certain new and novel arrangements and combination of parts as will be hereinafter more fully described and set forth in the claim.

Referring now to the drawings showing a preferred embodiment,

Fig. 1 is a side elevation of the transmission mechanism, a fragmentary portion of the paver frame and a fragmentary portion of the boom;

Fig. 2 is a top plan view of the transmission mechanism, parts being removed and parts being broken away for the sake of clearness;

Fig. 3 is a vertical transverse sectional view taken on the line 3-3 of Fig. 1 with parts of the boom and conveyor being shown in elevation; and

Fig. 4 is a fragmentary top plan showing a portion of the conveyor belt, the clutch for operating the same, the drums and their mechanism for operating the carriage along the boom, and the clutch for traversing the boom.

Referring now more specifically to the several views, and for the moment to Fig. 1, there may be seen a fragmentary portion of the main frame I of the paver, while extending downwardly therefrom may be seen the channels 2 and 3, on which is mounted the transmission mechanism 4. Also at the top of the view may be seen the chute, gate, and boot for regulating the flow of aggregates to the endless conveyor. These elements do not enter into the invention, so are not described in detail.

Extending inwardly of the transmission is the main power drive shaft 5, that is operated from the power plant of the paver. Besides driving the transmission 4, the power shaft also drives the stub shaft 6 through the sprocket chain 1, the shaft 6 having the pinion 8 thereon which, in turn, operates the clutch 9 through the operation of the slip collar Ill of the clutch, so that the worm shaft ll may be rotated in either of the desired directions, as will be readily apparent. The slip collar I0 is operated through the arm 12 and connecting rod l3, a fragmentary portion of the rod being shown. The worm shaft I I through the worm 14 operates the traverse gear I 5 in the transmission 4, which will be later described, so that by moving the control rod' l3 to operate the clutch, the boom may be traversed to the right or left, as desired.

Referring now for the moment to Fig. 3, it will be noticed that the transmission 4 mounted on the channels 3 comprises an upper rotatable casing I6 and-a lower stationary casing IT, and let us consider first the lower casing and its parts.

The power shaft 5 enters the transmission housing through the reinforced opening l8 (Fig.

1) and is provided with a pinion l9 thereon, which meshes with the bevel master gear 20 which, in turn, is mounted on the lower end of a vertical shaft 2|.

There may also be seen the bottom pan 22, which is bolted to the circular wall 23 formed on the bottom plate 24 of the lower part I! of the transmission, so that the pinion and gear just referred to may be greased, removed, or replaced if ever damaged.

Also extending upwardly from this plate 24 and centrally thereof is the integral hub casing 25, which terminates at 26, and in which extends the pintle or hub 21 formed on the plate 28, which plate and pintle constitute a portion of the upper rotatable casing or portion l6 of the transmission mechanism.

It is through the pintle 21 and likewise through the plate 28 that the vertical shaft 2| extends. There may also be seen the mitre gear 29 mounted on the upper end of the shaft 2| which, in turn, meshes with the gear 30 mounted on the cross power shaft 3| which is, in turn, mounted in the split bearings 32 and in the extensions 44, later on referred to.

In Figs. 2 and 3, there is shown the rectangular upper housing 33 formed on the plate 28 for these last-mentioned gears, while on this housing there is fitted a removable cover plate 33', so that the gears are readily accessible.

At the outer ends of the shaft 3| are provided the sprocket wheels 34 for transmitting power to the shaft 46.

Now the traverse gear l5, heretofore-mentioned, which is operated by the worm I4, is secured by the bolts 35 to the downwardly extending walls 28 of the plate 28 of the upper portion l6 of the transmission, the periphery of the gear I being boxed in by the cover plate 36 that is fitted, as at 31, to the upwardly extending wall 38 of the plate 24 of the lower casing l1. Thus, when the gear I5 is rotated through the action of the worm M, the plate 28 with its pintle 21 and its gear l5 will be rotated with reference to the hub casing 25 and the lower part of the transmission, and as the boom is carried by this part of the transmission, the boom will rotate with the gear.

By having the vertical shaft 2| the central pivotal axis of the rear end of the boom, any traversing of the boom will not alfect the operation of the two gears 29 and 30, as the gear 30 will travel around the gear 29 on a transverse movement of the boom. Likewise, as the shaft 3| is the central horizontal pivotal axis of the rear end of the boom, the boom may be elevated or lowered, pivoting in the bearing housings 44' of the extensions 44, as shown. In other words, the transmission 4 is so arranged as to provide a central pivotal axis for traversing, while the cross shaft permits a pivotal raising or lowering of the boom. There may also be seen the further strengthening plates 43 extending from the rotating part N3 of the transmission housing to the extensions 44 of the channels 42 of the boom.

It will be noticed that the channels 42 of the boom have the downwardly extending bearing housings 44' in which the shaft BI is mounted, and it is in these bearings that the boom may be elevated or lowered, as just described.

As far as the specification has proceeded, it will be seen thatby providing a centrally located transmission of the type described at the discharge end of the paver, the boom may be'mounted thereon and is capable of being traversed and is also capable of being elevated while, regardless of its position, power may at all times be transmitted to the shaft 3! with its sprockets 34 at the end thereof.

Now supported on the channels 42 of the boom are the further bearings 45 in which is mounted the shaft 46 which, in turn, has the sprocket wheels 41 at its outer ends, over which run the chains 48 and which, in turn, are driven by the sprockets 34 which are mounted, as will be remembered, on the main cross shaft 3| and driven by the shaft 2| through the pinion and gears from the main power drive of the paver.

These chains and sprockets are well illustrated in Fig. 1, and their purpose is to drive an endless conveyor on the boom and also to furnish a means for driving drums at the opposite sides of the boom for advancing or retracting a carriage along the. boom, as shown in an application filed by me on May 25, 1935, bearing Serial Number 23,490, for Concrete pavers. These drums can be used in driving a different form of carriage, as shown in a further companion application filed by me on September 11, 1935, bearing Serial Number 40,179, for Distributing means for concrete pavers.

As the mechanism for operating the carriage positioning drums is fully described in the companion applications, it will be mentioned but briefly here.

Referring for the moment to Figs. 3 and 4, there will be noticed a bevel gear 49 which, in turn, meshes with the pinion 50 mounted on the shaft 5|, on the far end of which is the pinion 52 meshing with the loosely mounted mitre gears 53 and 53'. There is the usual sliding clutch collar 54 between the gears, so that the shaft 55, which is operated by this clutch collar, may be driven in either one of two desired directions.

On the outer end of the shaft 55 are the drums 56, on which endless cables 51 will be threaded, which extend out to a carriage (not shown), so that the same may be advanced and retracted along the boom, depending on the direction of rotation of the shaft 55. The clutch is operated through the arm 58 and its operating rod 59 so that a movement of this rod will cause the drums to travel in the desired direction, depending on the direction of movement of the said rod 59.

' This last-mentioned mechanism is actually not a part of the transmission, but the brief description is set out to show the advantages of a transmission of this kind.

I have not shown a clutch on the power shaft 5 to the transmission but, of course, one is provided, so that the power shaft 5 will be actuated only when it is desired to operate the conveyor belt which is, in turn, operated by the drum 6| mounted on the power shaft 46.

I have also only fragmentarily shown the boom structure, as it does not form the gist of the present invention.

As the structure of the transmission has been set out rather in detail, a brief description of the operation is only considered necessary.

If it is desired to traverse the boom, the power shaft 5 will be set in motion and an operation of a handle controlling the rod l3 in either direction will cause the worm l4 and the gear I5 totraverse the boom to the required position, as will be readily understood. The manually or power-operated drums for elevating the boom are not shown, but as the boom is mounted at its rear end with the shaft 3| as a pivotal point, it will be readily understood that the boom is capable of being raised or lowered. Continuing, the operation of the power shaft 5 through the pinion l9 and gear 20 will revolve the shaft 2| and, through the gears 29 and 30, rotate the shaft 3| and its sprockets 34 to, in turn, through the chains 48, operate the sprockets 41 and drive the shaft 46 with its drum 6| thereon to operate the conveyor belt 60. Likewise, an operation of the shaft 46 through its gears 49 and 50 will drive the clutch gears 53 and 53, and by shifting the lever 58, the slip collar 54 will lock the desired gear to the shaft 55 to, in turn, operate the drums 56 and their cables 51.

It will be understood that the shape of the housings for the transmission parts l6 and 11 may be arranged to fit diflerent types of booms and that I do not wish in any way to be limited to the exact construction shown.

Finally, it will be seen that by providing a flexible form of transmission, as shown, power may be transmitted to the several parts on the boom at all times, regardless of the angle of elevation of the boom or of the position of traverse.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

A transmission for a paver boom including an upper and a lower housing, the lower housing being stationary and the upper housing rotatable therein, a cross shaft mounted in said upper housing and said cross shaft extending into bearings mounted on the boom independently of the transmission, a vertical shaft in said transmission arranged to form a central pivotal axis for the rearend of the boom, a gear and a pinion respectively mounted on the vertical shaft and cross shaft, a worm and a gear for rotating the upper part of the housing and thereby the boom, and the worm adapted to be operated by a clutch, driving means connected with the said vertical shaft for rotating the cross shaft, sprocket means on the outer end of said shaft, and bearings at the outer end of said cross shaft permitting the boom to be elevated and lowered without affecting the driving means of the transmission.

AXEL E. LUNDBYE. 

